>Or at somewhat more inconvenience, a couple flat sticks with a
>C-clamp at each end, times two.

Much easier, actually - same two sticks, drill a hole in each end of
one that's a sliding fit on a drywall-type all-purpose screw.  Screw
'em into the other piece, adjusting as necessary.  Screwing through
the hose is considered degage' in the finest circles.

d